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Nickel 725 vs. AISI 403 Stainless Steel

Nickel 725 belongs to the nickel alloys classification, while AISI 403 stainless steel belongs to the iron alloys. They have a modest 22% of their average alloy composition in common, which, by itself, doesn't mean much. There are 29 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is nickel 725 and the bottom bar is AISI 403 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 34
16 to 25
Fatigue Strength, MPa 260
200 to 340
Poisson's Ratio 0.29
0.28
Reduction in Area, % 45
47 to 50
Shear Modulus, GPa 78
76
Shear Strength, MPa 580
340 to 480
Tensile Strength: Ultimate (UTS), MPa 860
530 to 780
Tensile Strength: Yield (Proof), MPa 350
280 to 570

Thermal Properties

Latent Heat of Fusion, J/g 320
270
Maximum Temperature: Mechanical, °C 980
740
Melting Completion (Liquidus), °C 1340
1450
Melting Onset (Solidus), °C 1270
1400
Specific Heat Capacity, J/kg-K 440
480
Thermal Expansion, µm/m-K 13
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.5
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 1.6
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 75
6.5
Density, g/cm3 8.5
7.8
Embodied Carbon, kg CO2/kg material 13
1.9
Embodied Energy, MJ/kg 190
27
Embodied Water, L/kg 270
99

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 240
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 300
210 to 840
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 23
25
Strength to Weight: Axial, points 28
19 to 28
Strength to Weight: Bending, points 24
19 to 24
Thermal Shock Resistance, points 23
20 to 29

Alloy Composition

Aluminum (Al), % 0 to 0.35
0
Carbon (C), % 0 to 0.030
0 to 0.15
Chromium (Cr), % 19 to 22.5
11.5 to 13
Iron (Fe), % 2.3 to 15.3
84.7 to 88.5
Manganese (Mn), % 0 to 0.35
0 to 1.0
Molybdenum (Mo), % 7.0 to 9.5
0
Nickel (Ni), % 55 to 59
0 to 0.6
Niobium (Nb), % 2.8 to 4.0
0
Phosphorus (P), % 0 to 0.015
0 to 0.040
Silicon (Si), % 0 to 0.2
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 1.0 to 1.7
0